phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9a246be3a7e54f4a6e1facc6d5c50b86' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9a246be3a7e54f4a6e1facc6d5c50b86', -1, 1770702169, 1770702169, 'd849d876', 1, 0, 0)

Line : 187
File : sessions.php